Warning: In these models of vehicles, the electric fan can operate with the ignition off. When working in the fan area, turn off its motor or disconnect the negative battery cable.
Spark plug wires
Note: Always apply silicone dielectric compound to the inside of the housing before connecting the spark plug wire, distributor cap or coil.
1. Spark plug wires should be checked and replaced if necessary at the same time as the spark plugs.
2. The easiest way to detect a defect is to visually inspect the spark plugs with the engine running. Start the engine in a dark, well-ventilated room and look at each spark plug. Be careful not to touch the rotating parts of the engine. If the wire is broken, you will see a glow or a slight spark in the damaged area. If you notice this, change the wires immediately
3. The spark plug contact wires should be inspected one by one, starting with the spark plug of the first cylinder (closest to the right end of the engine), so as not to get confused.
4. Disconnect the contact wire from the first spark plug.
5. Put the wire with the tip back on the spark plug protrusion. It should "sit" tightly. Otherwise, disconnect it again and use round-nose pliers to lightly squeeze the metal contact inside the rubber tip to the desired size.
6. Using a clean cloth, wipe off any dirt or grease from the entire length of the wire.
7. Check the cleaned wire for cracks, burns and other damage. Do not bend it sharply, otherwise the conductor may break.
8. Disconnect the wire from the distributor. Pull only by the rubber tip. Check for possible corrosion and crimp the contact if necessary. Install the wire back on the distributor.
9. Check each of the remaining spark plug wires, making sure each one is securely fastened to the distributor and to the corresponding spark plug.
10. If new contact wires are needed, purchase a set specifically for your engine modification. It is advisable to take a set of wires with pre-installed rubber tips. To avoid confusion in the ignition sequence, remove and install contact wires one at a time.
Distributor cap and rotor
Note: It is common practice to replace the distributor cap and rotor every time you replace the spark plug wires. So if you are replacing the wires, replace the distributor cap and rotor as well. But if you plan to use the old wires, be sure to check the condition of the cap and rotor.
11. Unscrew the mounting screws and remove the distributor cap. Check it for cracks, soot marks and wear, burnt or loose contacts (see figure).
25.11. The most common defects that can be seen when inspecting the distributor cap are shown here (if there are doubts about its functionality, it is better to install a new one).
1 Broken support.
2. Crack.
3. Trace of soot.
4. Charred or destroyed contact.
5. The center contact is worn or damaged.
12. Check the runner for cracks and carbon deposits. Make sure the center mount spring pressure is correct and check the runner head for cracks and wear (see illustration).
25.12. The ignition rotor should be checked for wear and corrosion as shown here (if in doubt, replace).
1. Insufficient spring pressure.
2. Contact corrosion.
3. Scuffs.
4. Cracks.
13. If damage or defects are detected, replace the runner and cover. Remember that the runner is held on the axis by two screws and is installed uniquely (in one position). Before installing the cover, lubricate the runner head with a silicone dielectric compound (see figure).
25.13. Before installing the cover, lubricate the runner with silicone dielectric compound.
1. This surface is not covered with the composition.
2. Runner holder screw.
3. Runner.
4. Lubricate the top, bottom and edges of the runner with 8 mm (1/32 inch) thick silicone dielectric compound.
14. When installing a new cover, disconnect the wires from the old one one by one and connect them to the new one in the same places - do not remove the wires at the same time, otherwise you may mix up the ignition order.